Series 3850-F Fiberglass Fixed System

The Series 3850-F is designed to emulate our 3800-T fixed system.
This system features a slim 1-7/16" perimeter sightline.

Design / Performance

The essential design of the Series 3850-F matches the Series 3800-T so that each can be used on the same project with almost seamless transition.

Perimeter frame comes standard with an integral nail-fin.

The Series 3850-F achieves an even better u-factor than its thermally broken aluminum twin (Series
3800-T.)

The inherent strength of the Series 3850-F system allows designers to create larger systems than most fiberglass window products. Additionally, the factory will insert metal stiffeners to achieve higher wind loads.